Hey keving-
with such a large T04 turbo, do you experience the mad lag as it spools up? im sure you havent really punched the car, reading about your mis-shifting and all but curious if you thought about NOS the 2->3k with like a 20 shot to get the car moving...

you said in your past post that boost kicked in at 3500, that's about 1k later than the SC, but yea, linear vs exponential boost increase.... are you saying you get full 5 psi at 3500?

 

I was wondering the exact same thing

 

I'm actually glad it has a little lag to keep the wheels from spinning... but of course, I can't give a fair analysis because there's a leak from the wastegate causing the turbo to not spool as fast as it should.

A small shot of nitrous would definitely be nice to have to spool the turbo, but traction will be an issue.

No, peak boost doesn't come at 3500 (note: leak)... I didn't catch when it hit peak boost but I'll let you know when I find out.

 

What?!?! No peak hold function?!?

Maybe I'll have to come up and check out your car again soon...
Pho again?

 

Oh no.... peak boost was recorded on the turbo timer and boost controller. I just don't know when 4 psi was achieved.

Pho sounds good.

 

Since the Stillen V1 and V2 blowers deliver linear boost, essentially they are easier on the engine internals right? Instant full boost from these turbo's such as Harold's is cool for fun-factor, but to me it sounds like it puts tons of strain on the VQ's guts. As much as I would like "roots" type boost, I can't afford a blown engine.

 

Yes.

Kev, when you launch and try to manipulate the gas pedal to control tire spin in 1st and 2nd does the lag factor inhibit smooth acceleration and bring tire spin when the boost comes on because it comes from zero to full quicker then a SC for example?

 

Yesterday night while giving a friend a ride, I was able to keep traction but spin 1st very high up in the RPMs... proabably around 5.5K to 6K up to redline. The shift to second hit hard and both tires spun for about a second or so.

The lag factor was not present at all. The car kept pulling after shifting into 2nd.



I played around with the boost controller yesterday... basically turned up the boost to 12 psi. While on the freeway, I found that boost kicked in at 2500 in 5th gear.

Turbo with 4 peak psi pulls harder than SC with 11 peak psi. That's just nuts. I guess the CFM is greater on the turbo at that point.

 

Only a dyno and or track time will tell this for sure. But o meter is deceiving you because of the quick spike in power from the turbo, sorta like nitrous. When I first put the SC on after having a 100hp shot for a while the SC felt weaker, it wasnt the case, just the butt dyno's being fooled from the spike of the nitrous to the smooth power increase of the SC.

uhhhhh no way on the CFM 4vs11. If you run out of CFM the PSI will stop increasing IIRC.

I want one

 

I would so like a turbo '03 Max. This is just killing me reading these posts.

 

or maybe you just 'forgot' how the 11psi sc felt......

 

Yes, I agree that only the dyno can prove if this was true or not. The SC just pulls and pulls but you don't really feel anything. Very deceiving.....

Hehehe I should have worded my comment better. Turbo 4 psi pulls harder than SC 11 psi at that RPM (2500). me silly if I ever say turbo 4 psi pulls harder than SC 11 psi.


No, I remember. It's almost like Jane's car.

 

Way to go Kev...now you've made all us Supercharged guys jealous and yurning for your hard bitting boost.

You say that you can spin both tires on the 1-2 shift for a second. Now i'm jealous. I'm running around 8psi of boost with all the bolt-ons and I can't even get a squeek from the 1-2, or on 5-2 downshifts @40mph. I sincerely hope it's all in the clutch, becuase with my kind of *supposed* power, not getting any chirpadge is pathetic. Especially when stock Maxima's can do it.

 

Didn't you just put on some good tires? That will drastically reduce you're ability to chirp the tires (which is a good thing!).

 

Maybe the driver shifts like Granny...

 

Even if I was an intermediate shifter, I should still be able to get SOME tire feedback!

Ejj: Ya, I just got some brand new 245/40/18 Nitto W-Rated on 18x8.5's. (24lbs. each) Keep in mind I STILL couldn't get any tire feedback with my 17x8's (20lbs) on 235/45/17 Kumho H-rated!

It's definatally not the blower. The bearings were nice and tight and everything looked in tip-top shape. It's boosting strong becuase I can feel it.

Has anyone ever heard of Dynomax clutches for Maxima's? Becuase that's what I have. We ordered it through a local Autozone. It was $119.99! Looked wimpy too. So the way I look at it, it's like a 110lb. skinny dweeb trying to bench press 250lbs. It's really hard for that kid to hold the weight, or power. I came up with that analogy myself.

 

Is your clutch slipping?

 

It slips on occasion. For instance, I will be engaged in first gear and floor it around 10mph. 6 times out of 10 it will rip away, but sometimes it will lag and shudder a bit, as if it's struggling to catch. Other instances would be my downshifting and the revvs just shooting upwards. I've noticed that when I drive hard (multiple downshifts and quick upshifts) the clutch starts slipping real bad.

An ACT will be coming my way soon. Then hopefully I will be posting about how I layed 30 feet of rubber going into second.

 

yes and they suck.
change to act (i can help order one if you need) and all things will be different, but do not go trying the 5-2shifts to show off with it, or dont be expecting your stuff to run long.. why the abuse? I mean i drriiive my car , but i try not to abuse it - big difference. Anyone can do a burnout, heck I know someone who has a stock neon that chirps/spins 3rd consistently.. this is why i dont even care to ever burn out for people-

now having smoke pour from the tires at 70mph when i just punch it , thats different

 

What have you heard about them?



You've gotta be kidding me...seriously, you can't do that, can you? Maybe on 12x4's with balding -h rated's?

As for the ACT clutch....i'm gonna PM you!

 

It's gotta be the clutch, Craig. I had no trouble chirping 2nd with my ACT clutch even before the SC install.

 

Yea...CKNY has an ACT and heavy 18's with mild bolt ones (n/a) and says he can chirp the hell outta second.

I opened the car up for the first time in about a week. The clutch has been babied so I wanted to see what she'd do. The tires squeeled a little at the top of first gear, but still no chirp into second. Now I'm no pro shifter, but I can shift while still well into boost.

Also on the highway, while merging, the middle lane was open so I d/shifted into second @30mph. A car in the left lane was going 75, and I instantly caught up to him. At the top of 3rd I was passing him. But I was told that I should get a chirp on a downshift like that, so the clutch is delivering the power softly and obviously most be taking some away.

 

As long as the clutch isn't slipping then you're not really losing power, and it sounds like your clutch is absorbing a lot of shock that would otherwise might be hurting your transmission and drive axles. You better be nice to your tranny if you do install an ACT, or I'm afraid we're going to hear edw type whining out of you.

 

Hehe. Nice to hear the opinion of someone who has tried both. You are the first to have tried both. Once you get that wastegate leak fixed and use the Blitz boost controller so it opens at your specified psi rather than opening slowly before it actually gets there, you should hopefully feel a nice difference!

 

Craig you've got to have a clutch problem of some sort... I can spin 2nd on some of the stickiest tires on the market, and 3rd on my all season tires. If you can't then you clutch is on the weak side I think or you just aren't banging the gears hard enough :P

 

You have an ACT right?

I wish one of you guys lived closer to me so you could drive my car and see for yourselfs.

When going WOT, what RPM should I be at when shifting into second ideally? That way maybe I can judge better if it's my shifting. But I highly doubt that it is becuase when the clutch was brand new after the 5spd swap, I could chirp into second. That was without the blower.

 

It is defenetly the clutch, what do you expect from a stock replacement clutch? Like someone said earlier, it is abosrbing all the 'shock' that would normally be transmitted to the driveline. Unless you are 'riding' the clutch pedal....

 

Makes sense.

And I never ever ride the clutch pedal except in traffic jams on the highway when you have to creep but can't get away with keeping it alive in gear. Anyone else do this?

 

Some times, but I like to stop and wait for a streach to open up then pull up. It ****es the people off behind you, but f them! It saves my clutch and car from un needed stress. SUV's with AT's can kiss my a s s!

 

Yea man, I feel exactly the same way. Me and my friend talk about that when in traffic jams...people with automatics just don't understand our position and appriciate that we are actually driving the car, and not having it drive for us.

A negitive about how you do it would be that you always gotta be moving your foot, and moving the shifter in and out of neutral. That makes me go a little crazy at times! I can only imagine how it's gonna be with an ACT.

The Max has enough torque that I can just slowly let out the clutch while barely tapping the gas for feedback...that and my clutch is soft. Will I still be able to do this with the ACT, or would it just abruptly conk out?